How to Change Battery in Mercedes Key Fob 2020: Simple Steps for a Quick Fix

Have you ever found yourself struggling to unlock your Mercedes because the key fob just won’t respond? It’s a frustrating situation that can happen to anyone, especially when the battery runs low. But don’t worry; changing the battery in your 2020 Mercedes key fob is easier than you might think.

Key Takeaways

• Know Your Key Fob: The 2020 Mercedes key fob is essential for vehicle access and features various functions, all powered by a small lithium battery that may eventually require replacement.
• Tools Required: You’ll need a flathead screwdriver, a CR2025 or CR2032 replacement battery, tweezers, a magnifying glass, and a small container for screws to effectively change the battery.
• Step-by-Step Process: Carefully follow the steps of preparation, opening the fob, removing the old battery, installing the new battery, and securely closing the fob to ensure successful replacement.
• Troubleshooting Tips: If your key fob doesn’t work after the battery change, check the battery orientation, clean the compartment, and test with another battery; also consider signal interference and potential damage to the fob itself.
• Reprogramming & Assistance: If issues persist, you may need to reprogram the key fob or consult a technician, especially if other electrical problems in the vehicle are suspected.

Overview of Mercedes Key Fob

Mercedes key fobs for the 2020 models are advanced devices that provide easy access to your vehicle. They feature multiple functionalities, such as remote locking and unlocking, trunk release, and panic alarm activation. These key fobs rely on small batteries to operate all these functions efficiently.

Key fobs typically contain a small lithium battery. This type of battery assures long-lasting performance under normal usage. However, as with any electronic device, the battery eventually depletes, causing the fob to become non-responsive. Regularly checking the battery status can prevent inconvenience in the future.

When the key fob begins to show signs of weakness, like decreased range or delayed response, replacing the battery becomes necessary. Knowing how to change the battery will save you time and effort. You’ll avoid trips to the dealership or locksmith. The following sections will guide you through the simple steps for replacing the battery in your 2020 Mercedes key fob.

Tools Required

Changing the battery in your 2020 Mercedes key fob requires a few simple tools to make the process seamless. Here’s what you’ll need.

Essential Tools

• Flathead Screwdriver: Use a small flathead screwdriver to gently pry open the key fob and access the battery compartment.
• Replacement Battery: Purchase a CR2025 or CR2032 lithium battery, depending on your key fob model. Check your owner’s manual if unsure.
• Tweezers: Utilize tweezers to help position and remove the old battery without damaging the fob.

• Magnifying Glass: A magnifying glass assists in seeing the small components inside the key fob clearly.
• Small Container: Use a small container to hold screws and components to prevent loss during the battery change.

Having these tools ready will ensure you complete the battery replacement efficiently.

Step-by-Step Guide

Changing the battery in your 2020 Mercedes key fob is straightforward. Follow these steps for a smooth process.

Step 1: Preparing the Key Fob

Gather the necessary tools: a flathead screwdriver, a replacement CR2025 or CR2032 lithium battery, tweezers, a magnifying glass, and a small container for screws. Ensure a clean, flat workspace, and make sure your new battery is ready for installation.

Step 2: Opening the Key Fob Case

Locate the small slot on the side of the key fob. Insert the flathead screwdriver gently into the slot. Twist the screwdriver slightly to pop the case open. Be careful not to apply too much force, as this might damage the fob.

Step 3: Removing the Old Battery

Once the case is open, find the old battery. Use tweezers to lift it out carefully. Pay attention to the battery orientation. Noting which side faces up will help you place the new battery correctly.

Step 4: Installing the New Battery

Take the new CR2025 or CR2032 battery. Insert it into the compartment, making sure the positive side faces up, just like the old battery. Press down gently to ensure it fits snugly in place.

Step 5: Closing the Key Fob

Align the two halves of the key fob case. Press them together firmly until you hear a click. Ensure all edges are sealed properly to avoid any dust or moisture ingress. Test the key fob by pressing a few buttons to confirm that everything works smoothly.

Troubleshooting Common Issues

If your 2020 Mercedes key fob isn’t functioning properly after changing the battery, several common issues might be at play.

Key Fob Not Responding

1. Check Battery Orientation: Make sure the new battery is inserted correctly. The positive (+) side must face the designated direction in the key fob.
2. Inspect for Dirt or Debris: Clean the battery compartment gently. Dirt can hinder the battery’s contact with the terminals, causing issues.
3. Test with Another Battery: If the key fob still doesn’t work, try using a different CR2025 or CR2032 battery. Sometimes, new batteries can be defective.

Limited Range

1. Avoid Interference: Confirm there’s no interference from nearby electronic devices. Signal interference can affect your key fob’s performance.
2. Distance from Vehicle: Stand closer when attempting to unlock or start your vehicle. The effective range can sometimes decrease as batteries wear down.

Key Fob Still Not Working

1. Reprogram the Key Fob: If the fob remains unresponsive, consider reprogramming it. Refer to your vehicle’s manual for specific programming instructions.
2. Check for Damage: Inspect the key fob for signs of damage or wear. Cracks or chips may indicate that it requires repair or replacement.

1. Check Vehicle’s System: If a warning light activates on your dashboard, consult the vehicle’s manual. It may relate to more extensive electrical issues outside of the key fob.

Following these troubleshooting steps can help you resolve most common key fob issues efficiently. If problems persist, seek assistance from a qualified technician or your local dealership.

Conclusion

Changing the battery in your 2020 Mercedes key fob doesn’t have to be a hassle. With just a few simple tools and steps you can get your key fob working like new again. Regularly checking the battery status will save you from unexpected lockouts and keep those advanced features at your fingertips.

If you run into any issues after replacing the battery remember to double-check the orientation and clean out the compartment. You’ve got this! Keeping your key fob in top shape ensures you can enjoy all the convenience it offers without any interruptions. Happy driving!

Frequently Asked Questions

How do I know if my 2020 Mercedes key fob battery is low?

If your key fob is unresponsive or has a decreased range, these are signs that the battery may be low. You might also notice a delay when pressing the buttons. Regular checks of battery performance can help prevent inconvenience.

What tools do I need to replace the key fob battery?

You’ll need a flathead screwdriver, a replacement CR2025 or CR2032 lithium battery, tweezers, a magnifying glass, and a small container for screws. Having these tools ready makes the replacement process smoother.

Can I replace my Mercedes key fob battery myself?

Yes, replacing the battery in your Mercedes key fob is a straightforward process you can do yourself. The article provides a detailed guide that outlines every step needed to complete the task successfully.

What should I do if my key fob is still unresponsive after changing the battery?

If your key fob remains unresponsive, check the battery orientation, ensure the compartment is clean, and test with another battery. If the problem persists, consider reprogramming the fob or consulting the vehicle’s manual for further issues.

How often should I check my key fob battery?

It’s advisable to check your key fob battery status regularly, especially if you notice signs of diminished performance. Checking every few months can help avoid unexpected battery failures.